Question: What subclass model of spaceship has the longest shelf life?
Paraphrase: Name the subclass model of spaceship with the greatest service life.
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q29048322 . ?ent wdt:P4218 ?obj . ?ent wdt:P279 wd:Q40218 } ORDER BY DESC(?obj)LIMIT 5